Question

subtract the sum of 10p-7q+8r and 2p+3q-5r from the sum of p+ q+ r and 4p-3q-2r

Answer 1

a] 10p-7q+8r
+2p+3q-5r
=12p-4q+3r

b]p+q+r
+4p-3q-2r
=5p-2q-1r.

c]5p-2q-1r
-12p-4q+3r
=-7p-6q+2r

Hope it is correct..
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